Here’s a quick little snippet of how to check if one of your objects implements a specific interface. I’m not sure if there’s a ‘better’, or more efficient way to do this but I’ve been using this method to do this check for quite some time:

if (typeof(IMyInterface).IsAssignableFrom(myObject.GetType()))
{
	//Do stuff...
}

UPDATE:

Turns out there is a way easier and probably much more efficient way of doing this! I just didn't know it worked with interfaces too

if (myObject is IMyInterface) { //Do Stuff.. }

Much nicer!